摘要
应用Comsol Multiphysics软件建立冷凝盘多物理场耦合模型,对真空碳热还原冷凝过程温度场进行有限元数值模拟。结果表明,冷凝过程冷凝盘内最大温差从832降低至429 K,温度梯度从44降低至24 K/cm,槽内最高温度由928降低至763 K,冷凝槽中心温度迅速降低至625 K并保持稳定。因此,选择传热性能优良的坩埚并改善炉内隔热材料性能以及优化真空炉水冷系统结构,使冷凝盘内最高温差增大冷凝槽中心保温温度降低,将有利于还原产物的冷凝分离还原富集。
The time evolution of temperature field distribution of the graphite condenser,in the shape of a truncated hollow-cone connected to outer-edge of U-slot ring(resembling savarin-mold),was reasonably approximated,theoretically analyzed and numerically simulated with Comsol Multiphysics software.The influence of the furnace environment on the temperature field was investigated.The results show that the variables,including but not limited to the water-cooling capacity,condenser geometry,thermal insulation of crucible and furnace,all have a major impact.For example,on reaching thermal equilibrium,the simulated data included:a reduction of the largest temperature difference from 832 to 429 K,a decrease of temperature-gradient from 44 to 24 K/cm,a drop of the highest temperature in U-slot from 928 to 763 K,and a decreased holding temperature of 625 K at the center of U-slot ring.We suggest that the simulated results be of some technological interest in vacuum metallurgy.
作者
陈浩林
谢克强
纪文涛
黄海艺
Chen Haolin;Xie Keqiang;Ji Wentao;Huang Haiyi(State Key Lab of Complex Nonferrous Metal Resources Clean Utilization,Kunming University of Science and Technology,Kunming 650093,China;Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China;National Engineering Lab for Vacuum Metallurgy,Kunming University of Science and Technology,Kunming 650093,China)
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2020年第1期91-97,共7页
Chinese Journal of Vacuum Science and Technology
基金
国家自然科学基金资助项目(51764033).
关键词
真空热还原
冷凝
温度场
有限元分析
Vacuumreduction
Condensation
Temperature field
Finite element analysis
作者简介
联系人:谢克强,Tel:18468147133,E-mail:xkqzhh@sina.com
